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Receptive Aphasia
Wernicke's aphasia, also known as receptive aphasia, sensory aphasia or posterior aphasia, is a type of aphasia in which individuals have difficulty understanding written and spoken language. Patients with Wernicke's aphasia demonstrate fluent speech, which is characterized by typical speech rate, intact syntactic abilities and effortless speech output. Writing often reflects speech in that it tends to lack content or meaning. In most cases, motor deficits (i.e. hemiparesis) do not occur in individuals with Wernicke's aphasia. Therefore, they may produce a large amount of speech without much meaning. Individuals with Wernicke's aphasia are typically unaware of their errors in speech and do not realize their speech may lack meaning. They typically remain unaware of even their most profound language deficits. Like many acquired language disorders, Wernicke's aphasia can be experienced in many different ways and to many different degrees. Patients diagnosed with Wernicke's aphasia ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Broca's Area
Broca's area, or the Broca area (, also , ), is a region in the frontal lobe of the dominant hemisphere, usually the left, of the brain with functions linked to speech production. Language processing has been linked to Broca's area since Pierre Paul Broca reported impairments in two patients. They had lost the ability to speak after injury to the posterior inferior frontal gyrus (pars triangularis) (BA45) of the brain. Since then, the approximate region he identified has become known as Broca's area, and the deficit in language production as Broca's aphasia, also called expressive aphasia. Broca's area is now typically defined in terms of the pars opercularis and pars triangularis of the inferior frontal gyrus, represented in Brodmann's cytoarchitectonic map as Brodmann area 44 and Brodmann area 45 of the dominant hemisphere. Functional magnetic resonance imaging (fMRI) has shown language processing to also involve the third part of the inferior frontal gyrus the pa ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Computed Tomography
A computed tomography scan (CT scan; formerly called computed axial tomography scan or CAT scan) is a medical imaging technique used to obtain detailed internal images of the body. The personnel that perform CT scans are called radiographers or radiology technologists. CT scanners use a rotating X-ray tube and a row of detectors placed in a gantry to measure X-ray attenuations by different tissues inside the body. The multiple X-ray measurements taken from different angles are then processed on a computer using tomographic reconstruction algorithms to produce tomographic (cross-sectional) images (virtual "slices") of a body. CT scans can be used in patients with metallic implants or pacemakers, for whom magnetic resonance imaging (MRI) is contraindicated. Since its development in the 1970s, CT scanning has proven to be a versatile imaging technique. While CT is most prominently used in medical diagnosis, it can also be used to form images of non-living objects. The 1979 Nob ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Neuropsychology
Neuropsychology is a branch of psychology concerned with how a person's cognition and behavior are related to the brain and the rest of the nervous system. Professionals in this branch of psychology often focus on how injuries or illnesses of the brain affect cognitive and behavioral functions. It is both an experimental and clinical field of psychology, thus aiming to understand how behavior and cognition are influenced by brain function and concerned with the diagnosis and treatment of behavioral and cognitive effects of neurological disorders. Whereas classical neurology focuses on the pathology of the nervous system and classical psychology is largely divorced from it, neuropsychology seeks to discover how the brain correlates with the mind through the study of neurological patients. It thus shares concepts and concerns with neuropsychiatry and with behavioral neurology in general. The term ''neuropsychology'' has been applied to lesion studies in humans and animals. It ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Aphasias
Aphasia is an inability to comprehend or formulate language because of damage to specific brain regions. The major causes are stroke and head trauma; prevalence is hard to determine but aphasia due to stroke is estimated to be 0.1–0.4% in the Global North. Aphasia can also be the result of brain tumors, brain infections, or neurodegenerative diseases (such as dementias). To be diagnosed with aphasia, a person's speech or language must be significantly impaired in one (or more) of the four aspects of communication following acquired brain injury. Alternatively, in the case of progressive aphasia, it must have significantly declined over a short period of time. The four aspects of communication are auditory comprehension, verbal expression, reading and writing, and functional communication. The difficulties of people with aphasia can range from occasional trouble finding words, to losing the ability to speak, read, or write; intelligence, however, is unaffected. Expressive la ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Paragrammatism
Paragrammatism is the confused or incomplete use of grammatical structures, found in certain forms of speech disturbance. Paragrammatism is the inability to form grammatically correct sentences. It is characteristic of fluent aphasia, most commonly receptive aphasia. Paragrammatism is sometimes called "extended paraphasia," although it is different from paraphasia Paraphasia is a type of language output error commonly associated with aphasia, and characterized by the production of unintended syllables, words, or phrases during the effort to speak. Paraphasic errors are most common in patients with fluent for .... Paragrammatism is roughly synonymous with " word salad," which concerns the semantic coherence of speech rather than its production. Cause Huber assumes a disturbance of the sequential organization of sentences as the cause of the syntactic errors (1981:3). Most students and practitioners regard paragrammatism as the morphosyntactic "leitsymptom" of Wernicke's aphasia. H ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Logorrhea (psychology)
In psychology, logorrhea or logorrhoea (from Ancient Greek λόγος ''logos'' "word" and ῥέω ''rheo'' "to flow") is a communication disorder that causes excessive wordiness and repetitiveness, which can cause incoherency. Logorrhea is sometimes classified as a mental illness, though it is more commonly classified as a symptom of mental illness or brain injury. This ailment is often reported as a symptom of Wernicke's aphasia, where damage to the language processing center of the brain creates difficulty in self-centered speech. Characteristics Logorrhea is characterized by the constant need to talk. Occasionally, patients with logorrhea may produce speech with normal prosody and a slightly fast speech rate. Other related symptoms include the use of neologisms (new words without clear derivation, e.g. hipidomateous for hippopotamus), words that bear no apparent meaning, and, in some extreme cases, the creation of new words and morphosyntactic constructions. From the " ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Agraphia
Agraphia is an acquired neurological disorder causing a loss in the ability to communicate through writing, either due to some form of motor dysfunction or an inability to spell. The loss of writing ability may present with other language or neurological disorders; disorders appearing commonly with agraphia are alexia, aphasia, dysarthria, agnosia, acalculia and apraxia. The study of individuals with agraphia may provide more information about the pathways involved in writing, both language related and motoric. Agraphia cannot be directly treated, but individuals can learn techniques to help regain and rehabilitate some of their previous writing abilities. These techniques differ depending on the type of agraphia. Agraphia can be broadly divided into central and peripheral categories. Central agraphias typically involve language areas of the brain, causing difficulty spelling or with spontaneous communication, and are often accompanied by other language disorders. Peripheral agr ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Neuroplasticity
Neuroplasticity, also known as neural plasticity, or brain plasticity, is the ability of neural networks in the brain to change through growth and reorganization. It is when the brain is rewired to function in some way that differs from how it previously functioned. These changes range from individual neuron pathways making new connections, to systematic adjustments like cortical remapping. Examples of neuroplasticity include circuit and network changes that result from learning a new ability, environmental influences, practice, and psychological stress. Neuroplasticity was once thought by neuroscientists to manifest only during childhood, but research in the latter half of the 20th century showed that many aspects of the brain can be altered (or are "plastic") even through adulthood. However, the developing brain exhibits a higher degree of plasticity than the adult brain. Activity-dependent plasticity can have significant implications for healthy development, learning, mem ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Western Aphasia Battery
Western Aphasia Battery (WAB) is an instrument for assessing the language function of adults with suspected neurological disorders as a result of a stroke, head injury, or dementia. There is an updated version, the Western Aphasia Battery-Revised (WAB-R). It helps discern the presence, degree, and type of aphasia. It also measures how the patient performed on the test to provide a baseline so they can detect changes throughout their time in therapy. This also allows to see the patient's language strengths and weaknesses so that they can figure out what to treat, and lastly, it can infer the location of the lesion that caused aphasia. Another such test is the Boston Diagnostic Aphasia Examination. The WAB targets English speaking adults and teens with a neurological disorder between the ages of 18 and 89 years old. The WAB tests both linguistic and non linguistic skills. The linguistic skills assessed include, speech, fluency, auditory comprehension, reading and writing. The non-ling ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Boston Diagnostic Aphasia Examination
The Boston Diagnostic Aphasia Examination is a neuropsychological battery used to evaluate adults suspected of having aphasia, and is currently in its third edition. It was created by Harold Goodglass and Edith Kaplan. The exam evaluates language skills based on perceptual modalities (auditory, visual, and gestural), processing functions (comprehension, analysis, problem-solving), and response modalities (writing, articulation, and manipulation). Administration time ranges from 20 to 45 minutes for the shortened version but it can last up to 120 minutes for the extended version of the assessment. There are five subtests which include: conversational & expository speech, auditory comprehension, oral expression, reading, and writing. In the extended version all questions are asked while in the shortened version only a few questions are asked within each subtest. Many other tests are sometimes used by neurologists and speech language pathologists on a case-by-case basis, and othe ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
American Speech–Language–Hearing Association
The American Speech–Language–Hearing Association (ASHA) is a professional association for speech–language pathologists, audiologists, and speech, language, and hearing scientists in the United States and internationally. It has more than 218,000 members and affiliates. The mission of the American Speech–Language–Hearing Association is to promote the interests of and provide the highest quality services for professionals in audiology, speech–language pathology, and speech and hearing science, and to advocate for people with communication disabilities. The association's national office is located at 2200 Research Boulevard, Rockville, Maryland. The organization also has an office on Capitol Hill. Vicki R. Deal-Williams is currently serving as the association's chief executive officer. History ASHA was founded in 1925 as the American Academy of Speech Correction. The current name was adopted in 1978. Council for Academic Accreditation The Council for Academ ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
